Cladosporium fungus and application thereof

The invention discloses a cladosporium fungus and application thereof, and belongs to the technical field of microorganisms. The cladosporium fungus is separated from tamarix chinensis rhizomes collected from the national natural reserve of the Yellow River Delta in Shandong, and is preserved in the China Center for Type Culture Collection on November 11, 2021, and the preservation number is CCTCC NO.M 20211403. The bacterium and the fermentation product thereof have a remarkable inhibition effect on multi-drug-resistant botrytis cinerea, and the EC50 value of the fermentation product is only 97.6 mg/L; in addition, the compound also has different degrees of inhibition effects on valsa mali and tomato fusarium wilt. Therefore, the strain and a fermentation product thereof can be prepared into a microbial preparation which is used for preventing and treating botrytis cinerea, valsa mali and tomato fusarium wilt, has the advantages of good degradability, high safety, difficulty in generating drug resistance and